If you liked Sylvanas' armor but not painting your skin you should look at Alexstrasza
. She's got fairly normal (if a bit pink/ruddy) skin and a very similar armor style. She's also a bit of a "sexy cosplay" icon, I think so anyway.
If you don't care for her exact design/colors there are plenty of other dragons, but Ysera
has the same issue with painting your skin. Nozdormu
has white skin but you'd have to do a genderbend design (if you have issues with that/don't want to have to change designs). In fact there's plenty of named dragons with human forms, or popular fan designs (like genderbent Deathwing), so while you may not know the lore you should maybe flip through the wiki page on WoW's dragons and browse the images there.
Oh, another option would be to look into the Dresspheres
from Final Fantasy X-2. I've always been a fan of Yuna's Berserker
sphere. Alchemist or Dark Knight would also be good options if you're looking for armor-heavy stuff.